Igniter for explosive-engines.



PATENTED AUG. '7, 1906.

J. BOYLE. IGNITER FOR EXPLOSIVB ENGINES.

APPLIGATION FILED NOV. 21.1903.

UNITED STATES PATENT mnuon. JOHN BOYLE, OF PEABODY, MASSACHUSETTS.

, 'IHGNITER FOR 'sx LoswE-ENemss.

- Patented Aug. 7, 1906.

Application filed November 21'. 1903. Serial No. 182.094.

Toall whom, it may concern:

Be it known that I, JOHN BOYLE, of Peabody, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Igniter's for Explosion-Eng es, of which the following is a specification.

. This invention relates to ex losion-engine igniters of the make-'and-brea variety, and

its. principal objects are the following: first,

' to maintain the contacts in clean condition;

second, to separate the contacts by an abrupt reak, and, third, to provide im-. proved-means for advancing and retarding or hammer the spark. I

In the referred embodiment which I have herein ill fls trated' the movable electrode or sparkin point is so mounted as to have a tIRIISlBLtIVG movement in addition to its movement .of approach to and recession from thefixed electrode, so that While in .contact with said -fixed electrode the movable electrode, rubs against the fixed electrode, and therefore kee s the surfaces bright and free from soot an corrosion. The movable elec-. trode, as shown, 1s an oscillatoryarm whose shaft is mounted in a sleeve which is tripped by the engine, the arrangement bein such that the movement of sai sleeve in a dition to oscillating the arm shifts the same to impart the rubbing movement. The sleeve and electrode-arm are connected by'a spring and provided with abutting shoulders, so that when the sleeve is released from'its tripping device the spring causesit to give aammer-blow to the. stem of the electrode-'- arm, thus producin an abrupt separation of said arm from the fixed electrode. For advancing and retarding the spark the reciprocating rod which trips the aforesaid sleeve is mounted in a guiding-bearing which is Lshiftable laterally, so as to cause the path of the tripper on the end of said rod to include a greater or'less 'arc of the tri ped member on the sleeve, thereby timing the release of said sleeve with relation to the stroke of the en.-

gme. v

' Of the accompanying drawings, Figure 1 represents a side elevation. of an explosionengine provided with my improved igniter.

Fig. 2 represents a section on line 2 2 of Fig. 1.

Fi 3 represents a partial section on line 3 3 of i .2. Figs. 4 and 5-.represent views of the e ectrodes in --separated and contacting positions. Figs. 6 and 7 represent sectionson the. line 6 7. of Fig. 2,.showing the corresponding positions of the abutting shoulders on the sleeve and electrode-stem. Fig. 8 represents a vertical section of the trippingrod. Fig. 9 represents a section on line 9 9 of Fig. '8. Fig. 10 re resents an end elevation, showing a mo ified form of i niter. Fig. 11 represents a-vertical section t ereof.

Figs. 12 and 13represent horizontal sections thereof with the parts in different positions.

Fig. 14-. represents a section on line 14 14 of sleeve 26, which itself is journaled in a removable bush 27, fixed in the cylinder-wall. On the part of said sleeve surrounding the outer end of the electrode-stem is a rigidlymounted rojecting arm or tripped member 29, provi ed with a bevel 30. On the outer end of the stem 25 is a fixed collar 31, having a shoulder 32, which cooperates with a complemental shoulder 33 on the sleeve 26, as

est seen in Figs. 6 and 7. A helical spring 34 has its opposite ends connected, respec tively, to the sleeve 26 and collar 31,'.and constitutes a yielding or compensating connection between the sleeve 26 and stem 25. A stop 35, formed on the bush 27, arrests the. return movement of arm 29 after its release. The arm 29 is tri ped by a dog 36, journaled on the upper end actuated rod 37, and having a spring connection 38 therewith.

v The operation of the parts thus far de scribed. is as follows: On the upward moveof a reciprocating engine.

is journaled eccentrically. in an oscillatory ment of the rod 37 the dog 36 engages and oscillates thearm'29, thereby rocking the sleeve 26, and ,by its further movement-releases it and'p'ermits its. return to the stop 35. On the return movement of the rod 37 the do 36 encounters the bevel 30 and is oscillate on its tial oscillatory movement of the arm 29 is red without affecting the arm 29. The inicommunicated by friction and through the l spring 34 to the stem 25, bringing the electrode 24 into contact with. the electrode 22. This contact arrests further oscillatory IIO 'movement of the electrode 24; but the arm 29 andsleeve 26 continue to rotate, the

s ring 34 yield' ers 32 33, O ng to. the eccentric'journaL' This separates the shouling of stem 25 in sleeve 26-, such continued rotation of the sleeve imparts a movement of translationto the'stem and shifts it in the direction of the movable electrode 22, as illustrated inFig. 5, thereby producing a rubbing contact between the electrodes 22 and 24. When the dog 36 has escaped upwardly past the arm 29, the tension of spring 34 returns said arm until the shoulders 32 33 come into contact, the spring at the same time reacting against the stem 25, holding the movable elec trode against the fixed one, while permitting the former to slide back, owin to the eccenv tricity of the sleeve 26 now roc ing in the opymovable electrode.

posite direction, into the position occupied it when first brought into engagement with the fixed electrode. The inertia of the arm 29 and its sleeve 26 causes the abutment 33 to strike the other abutment withasharp hammer-like blow and suddenly movethe arm 29 back against thestop 35, thereby causing an abrupt separation of the electrodes 2224 to cause an lgniting-spark. Thus it will be seen that four motions are given the It is first moved into contact with the fixedelectrode, then laterally in rubbing engagement, then in a lateral r by the electrodes are effectively freed from the lateral movement of the movable one and return movement still in engagement with the fixed electrode, being held against it by the spring, and finallyis removed from contact suddenlv' The lateral rubbing action in two directions is very important, as theresoot, grease, &c., and kept bright and in the best possible condition. Also the separation of the electrodescoming at the last part of bein in a direction-somewhat inclined to the fixe electrode, not directly away from it in a perpendicular line, causes a drawing action 'which increases the length and duration of the spark, insuring a perfect ignition of the mixture. The tripping-rod 37 is pivoted at v 39. to another rod 40, connected at its lower end with. an eccentric 41 on the'lay-shaft 21 and havlng 1ts upper end guided in a bracket 42. Said bracket is formed with'a lateral bearing for the trip-rod 37. Said block. or gu de for a block 44, whichforms a uidingearmg has oppositely-projecting t eaded 5 5 stems45, carrying nuts 46, which enga e the ends of the ide--43. By manip ating these nuts the caring 44 may be shifted laterally with respect to the ion 'tudinal path ofmovementof rod 37, thereliy causing an 6 earlier'or later release'of the arm 29 by. the

tripp tri ping-dog'36.

niFigs. 10 to 14, inclusive, is shown amodi ficat-ion wherein a sleeve 47, carrying the ed arm 29, is mounted between a collar 50 on the electrode-stem 25 and the bush 27.

A projecting lug 48 on said sleeve is mounted between fixed cam members 49, giving the efiect of a screw, whereby the stem 25 is shifted axially when the sleeve 47 is oscillated. A spring 34 connects the sleeve 47 and stem 25, as before, and the sleeve and stem are provided with abutting shoulders 32 33, having the same function as the abutting shoulders previously described. When the arm 29 is *ing a ivoted dog 360, adapted to be swung 1n the p ane of the path of movement of triPperrod 37 upon encountering the arm 29 on the return movement of said trip-rod, the dog being yieldingly actuated by a spring 380..

T claim- 1. In an explosion-engineigniter, cooperating rigid sparking electrodes, one of which.

is mounted for movements into contact withand recession from the other and for rubbing movements bodily in op osite directions.

while in contact, and actuating means for: 1mparting said movements to the movable electrode including an engine-operated memberand an intermediate yielding device engagedtherewith and with the movable electrode for retaining the electrodes in contact while the rubbing movements take place.

2. in an explosion-engine igniter, an oscillatory electrode, a second electrode, arr-engine-actuated member imparting to said first electrode oscillatory movementstoward and;

away from the second electrode, and translative movements thereto bodily in opposite directions in contact with the second: electrode, and an external compensating comics-- t1on between said oscillatory electrode and:

member for retaining said electrodes in contact during the translative movements.

3. In an explosion-engine igniter, a= relattively stationaryi'el'ectroda'a' relatively movable electrode, relatively movable means for.

moving the same first toward and into contact with the relatively stationaryelectrode,

then laterally bodily first in one and then=inthe opposite direction in contact with the sta-. tionary electrode, and finally awa'y'from the stationary electrode, and a resilient connection between said movable electrode and said means. 2

4. In an explosion-engine igniter, an'oscilv. latory sparking electrode having astem, an oscillatory sleeve journaling said stem, en-

gine-operated means for oscillating said.--

sleeve, and a spring connected. to saidsleeve and stem.

5. In an explosion-engine igniter, an oscillatory sparking electrode having a stem, an oscillatory sleeve journalingsaid stem, an engine-actuated tripper for said sleeve, a spring connected to said sleeve and stem, and abutting shoulders on said sleeve and stem producing a hammer-break movement in said, electrode upon release of said sleeve by the tripper. a

6. In an explosion-engine igniter, an oscillatory electrode, an oscillatory tripped member connected therewith, a complemental v electrode, means actuated by the oscillation of said tripped member for imparting a bodily shifting movement to said oscillatory electrode whilerin contact with said complemental electrode, and I an engine-actuated tripper for advancing and suddenly releasing said'trippe d member. 4 p

7. In an explosion-engine, an oscillatory tripped member, engine-actuated means for movingand suddenly releasing said member, a fixed and. an oscillatory electrode, astem to" which said oscillatory electrode is connected, a yielding engaging device for communicating oscillatory moveme tfrom said tripped member to said stem andforreturning the, tripped member afterfits-release, and provisions whereby oscillation of said trippizil member causes rubbing movements of sa oscillatory electrode in op osite directions while in contact with said ed electrode.

8. In an explosion-engine, a edandanoscillatory electrode, a stem to ,w 'ch said oscillatory electrode is connected, an .osci lla-'v that oscillation of the tripped member moves 1 the oscillatory electrode, giving itirubbing movements in opposite directions while in contact with'the fixed electrode, and sud denly separates it from the latter, the yield ing member holding said electrodes in contact 'whilesuch rubbing -movements take place 7 9. In an explosion-engine igniter, '-an oscillatory sleeve, en e-actuated means for tummg and sudden y releasing the same, and a movableelectrode having a stem eccentrics ally 'journaled in said sleeve. r

10. In an explosion-engine igniter, an oscillatory sleeve, en e-actuated meansv for --turnin and sudden y releasing the same, a

movab e electrode having a stem eccentrics allyjournaled in said sleeve, and a spring connected to said sleeve andstem.

' 11. In an explosion-engine igniter, an oscillatory sleeve, re inc-actuated meansforturnin and sudden y-releasingthe same, a movab e electrode having'astem eccentrically journaled in said sleeve, abutting'shoulders on said sleeve and stem, and aspring.

'' connecting said sleeve and stem. s

e igmter, a-mov-f 12. In an explosion-en able electrode, anoscillatory trip ed memr ber,'a reci rocatingen" e-operate tripping rod, a gui ing bearm lock surrounding said rod, and provisions o]: laterally withrespect to the path of movement of the: rod.

- 13. In an exp cillato an oscill .engme-actuatedtripper for said sleeve, a

yi ding device between saidsleeve andstem. or transmitting oscillatory movement from one to the other, 'a bearing-surface onthe engine-c'ylinder actin on the sleeve to produce through rotation o thelatter recirocatory bodily movement of the stem, an abutting shoulders on saidfsleeve' and stem producing lesion-engine igniter, an '09-, sparkingelectrodehavm a stem, tory sleeve j o'urnahng 'sai stem, an

shifting said bearing 1 a hammer-breakmovement. in said electrode Y upon release-of said sleeve by the tri perQ In testimony whereof I ave a ed my signature in presence of two witnesses. a I I p v f JOHN-BOYLE.

Witnesses:

I C, F. BRowN,

'A. C. RATIGAN 

